Geologic map of the Union quadrangle, Boone County, Kentucky
By: by W.C. Swadley ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the Commonwealth of Kentucky, University of Kentucky, Kentucky Geological Survey.
Contributors: Geological Survey (U.S.); Kentucky Geological Survey.
Series: Geologic quadrangle map -- GQ-779.
Publisher: The Survey
Place of publication: Washington, D.C
Format: Map
Subjects: Geology -- Kentucky -- Boone County -- Maps.
Genres: Maps.
Other titles: Union quadrangle, Boone County, Kentucky, geologic map.
Notes: Relief shown by contours and spot heights.

"Base by U.S. Geological Survey, 1961. Modified 1968."

"Geology mapped in 1966-67."

"Contour interval 20 feet."

Includes text with bibliography, stratigraphic section, col. cross section, col. quadrangle map, and quadrangle location map.